Oil burner with air-whirling means



March 13, 41928.

Af R. JEPsoN OL BURNER WITH AIR WHIRLING MEANS Filed March 7, 192.5

Patented Mar.- 13, 1928.-

UNITED STATES f y 1,662,270 PATENT oFFlcE.

ARTHUR R. JEPSON, F MINNEAPOLIS, MINNESOTA Application mea nar-cn 7,1925'. serial italians,

This invention relates to an oil burner and while the invention isapplicable to burners.

I l chamber, means for supplying oil to the bottom thereof, means forsupplying air to the central and bottom part ot said chamber, and meansfor giving such air a whirling motion, together with means for supplyingair about the sides of said combustion chamber.

It is more specifically an object of this invention to provide an oilAburner comprising a cylindrical fire pot'having an opening at itscentral bottom portion for the admission of air, means for giving thisair a whirling motion, said fire pot having an annular channel aboutsaid opening to which oil is supplied and said fire pot having aperforated wall through which air is also supplied.

These and other objects and advantages of the invention will be fullysetforth inthe following description made in connection with theaccompanying drawings in which like reference characters refer to theSame 85 parts throughout the different views' and in which,

Fig. 1 is a top plan view of the burner, a certain portion being brokenaway and another portion shown in horizontal section;

and Fig. 2 is 'a vertical section through the burner taken on line 2-2of Fig. 1.

Referring to the drawings, the device comprises a shell 3 having anfopenlower end and adapted to rest upon the grate bars 4 of a burner. Whilethe shell 3 may be made of various forms, in the embodiment of theinvention illustrated, the same is shown as cylindrical in shape andsaid shell will be held in place by some suitable material 5 placed onthe grate bars, which material may be fire clay, asbestos packing, orsimilar material. The shell 3 has a supporting ring 3a spaced inwardlyfrom its wall from which arms 3b extend to the wall,

spaces 3 thus being formed between arms 3". -The shell 3 is providedwith a V-shaped grooveat its upper edge in which is supported the loweredge of a cylindrical shell 6, -said edge fitting in the groove in theshell 3. A burner section 7, shown as cylindrical in form, rests uponthe ring 3, said ring being rabbeted to receive the section 7 so thatsaid section is held in place on said E ring. The section 7 has acup-shaped portion 7a disposed centrally thereof at its lower end, thesides of which are formed with openings 7, a flange 7C ot' comparativelysmall height extending around the edge of the member 7a. The cup portion7a has an open upper end from which a passage 7I extends. The passage 71 has a shoulder formed therein on which is supportedl a member 8.

'hile this member may be variously formed,

in the embodiment of the invention illus trated, the same is shown asfoi-med ot' sheet metal and as having a plurality of inclined orhelically disposed vanes 8El extending radially, slits or openings 81thus being formed between said vanes. A flange 7 C of small heightsurrounds thel passage 7 and an annular channel or groove 7 f is formedin the section 7 outwardly of the {iange 7e. The section 7 has a tappedopening 7g at one side extending from channel 7f. with which communi-Cates Aanoil supply pipe 9 extending down- 1 wardly throughaspace 3 andthrough the grate bars 4. A drain pipe 10 extends down-l wardlycentrally of the cup portion 7a and 'communicates 4with the bottom ofsaid portion. The portion is also provided with a V- shaped groove atits upper outer edge on which rests a similarly shaped loweredge of acylindrical member 11, which, with the section 7, forms the combustionchamber or firepot of the burner. The member 11 has its wallfprovidedwith a multiplicity oit' openings 11a communicating with the passagebetween member 11 and the shell 6., A cover plate 12l is provided havinga depending flange fitting about the shell 6 and extending over themember 11 a short dist-ance inwardly of its upper edge, said cover 12having a central opening therein.

In operation, the fuel oil will be supplied under gravity or pressurethrough the .pipe

' 9. and the same will liow into the channel 7 f.

The members 7 and 11 will be preliminarily 'heated by priming or burningof fuel therein in some manner and when the oil enters the heated burnerthe same will be vaporized. Air will be supplied between the grate barstand will pass throughvthe opening 7b in the ortion 7EL and upwardlythrough the mem er 8. As the air passes through the member 8 and betweenthe inclined or helical blades thereof it will be given a whirlingmotion, as indicated by the arrows in Fig. 1. The vapor rising from theoil in the member 7 will be encountered by this whirling column of airand will be effectively mixed therewith. Air will also pass through theopenings 3, as indicated by the arrows in Fig. 2, and this air will passinto the member 1l through the openings lla in the sides thereof. Thisair will also be efficiently mixed with the vapor formed in the member 7and there will be, in effect, a multiplicity of jets of air directedinto this vapor. The vapor thus formed is encountered both at the centerand at the periphery of the burner by moving air and a very perfect andefficient combustible mixture is formed. The mixture will be ignited andthe flame will rise from the fire pot through the opening in the cover12. If for any reason there should be a surplus of oil the same willcollect in the cup-shaped portion 7a within the flange 7 c and the samewill be drained through the pipe l0 which preferably will be connectedwith a shut-off mechanism for the oil (not shown).

From the above description it is seen that applicanthas provided a.simple and efficient oil burner having -means for producing a veryefficient mixture of the fuel vapor and the air supplied thereto. Thevapor `formed in the burner is, as stated, efciently brought in contactwith the air, both at the periphery of the combustion chamber' or firepot and at the center thereof, the central supply of air being given awhirling motion so that the vapor will be efliciently mixedk therewith.The'burner, owing to the efficient mixture provided will be veryeconomical of oil, and

practically-.perfect combustin is secured.

The device is simple, easily made and assembled and the same is vereasily taken apart when desired for cleaning or repairs. The device issimple and inexpensive in construction. 'The same has been amplydemonstrated in actual practice and found to be very successful andefficient.

It will, of course, be understood, that various changes may be made inthe form, details, arrangement and proportion of the parts withoutdeparting from the scope of applicants invention, which, generallystated, consists in a device capable of accomplishing the objects aboveset forth, in the novel parts and combinations of parts disclosed anddefined in the appended claim.

lVhat is claimed is:

An oil burner having in combination, a cylindrical shell adapted to reston the grate bars of a furnace-having a supporting means inward of itswall, a bottom fire pot section resting on said supporting meanscomprising a cup-shaped lower central portion having openings throughits sides, said section having a central opening above said cup-shapedportion for the passage of air, means in said latter opening for givingsaid air a whirling motion, said section having an annular channelsurrounding said last mentioned means adapted to receive oil, a pipe forsupplying oil to said channel, a cylindrical shell forming-the uppertire pot section supported on said bottom section having a multiplicityof apertures through the wall thereof, a shell supported on said firstmentioned shell and of substantially the same diameter as said `firstmentioned shell and an annular cover extending over said last mentionedshell and inwardly of the edge of said secondV men# tioned shell.

In testimony whereof I aflix' my signature.

ARTHURR JP'soN.

